Natural factors affecting Habitat
that are positive or negative

What affects the size of a population of animals besides death from old age? "Limiting factors" influence the number of animals in a population. Are limiting factors good or bad?

extreme cold
  • Younger or weaker animals die
  • There may be fewer animals born
  • Takes more energy just to survive
  • Animals coulld get burned
  • food & cover burned
  • Water source may evaporate
  • Regrowth of nutritional vegetation
  • Encourages grass cover
  • Cleans out debris
extreme snow
  • Movement is difficult, requires
    more energy
  • Food is difficult, often impossible,
    to find
  • Thermal cover is difficult to reach & often ineffective
  • Insullates plants & animals from extreme cold
  • Vegetation withers, food disappears
  • Water sources dry up
  • Cover thins
over population
  • Habitat & wildlife washed away or inundated.
  • Vegetation drowns
  • Disperse seeds & soil
  • Crowding and trampling
    of vegetation
  • Disease spreads easily
  • Vegetation is stripped